71601110666 has 4 divisors (see below), whose sum is σ = 107401666002. Its totient is φ = 35800555332.

The previous prime is 71601110621. The next prime is 71601110681. The reversal of 71601110666 is 66601110617.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 71206254025 + 394856641 = 266845^2 + 19871^2 .

It is a super-3 number, since 3×71601110666³ (a number of 34 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17900277665 + ... + 17900277668.

Almost surely, 2^71601110666 is an apocalyptic number.

71601110666 is a deficient number, since it is larger than the sum of its proper divisors (35800555336).

71601110666 is a wasteful number, since it uses less digits than its factorization.

71601110666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35800555335.

The product of its (nonzero) digits is 9072, while the sum is 35.

The spelling of 71601110666 in words is "seventy-one billion, six hundred one million, one hundred ten thousand, six hundred sixty-six".